Exhibit 31.1

                    CERTIFICATION OF CHIEF EXECUTIVE OFFICER

               Under Section 302 of the Sarbanes-Oxley Act of 2002

    Regarding Annual Report on Form 10-K for the Year Ended December 31, 2006

I, Steven A. Rosso, certify that:

1.      I have  reviewed  this  annual  report  on Form  10-K of  Pacific  State
        Bancorp.

2.      Based on my knowledge, this report does not contain any untrue statement
        of a material  fact or omit to state a material  fact  necessary to make
        the  statements  made,  in light of the  circumstances  under which such
        statements  were made, not misleading with respect to the period covered
        by this report;

3.      Based on my knowledge,  the financial  statements,  and other  financial
        information  included in this  report,  fairly  present in all  material
        respects the financial  condition,  results of operations and cash flows
        of the registrant as of, and for, the periods presented in this report;

4.      The  Company's  other  reporting  officer  and  I  are  responsible  for
        establishing  and  maintaining  disclosure  controls and  procedures (as
        defined  in  Exchange  Act  Rules   13a-15(e)  and  15d-15(e))  for  the
        registrant and have:

        a)      Designed such disclosure controls and procedures, or caused such
                disclosure  controls  and  procedures  to be designed  under our
                supervision, to ensure that material information relating to the
                registrant,  including its  consolidated  subsidiaries,  is made
                known to us by others within those entities, particularly during
                the period in which this report is being prepared;

        b)      Evaluated  the  effectiveness  of  the  registrant's  disclosure
                controls  and  procedures  and  presented  in  this  report  our
                conclusions about the  effectiveness of the disclosure  controls
                and  procedures,  as of the end of the  period  covered  by this
                report based upon such evaluation; and

        c)      Disclosed in this report any change in the registrant's internal
                control  over  financial  reporting  that  occurred  during  the
                registrant's most recent fiscal quarter (the registrant's fourth
                fiscal  quarter  in the  case  of an  annual  report)  that  has
                materially  affected,  or is  reasonably  likely  to  materially
                affect,   the  registrant's   internal  control  over  financial
                reporting.

5.      The Company's other reporting officer and I have disclosed, based on our
        most recent evaluation of internal control over financial reporting,  to
        the  registrant's  auditors and the audit committee of the  registrant's
        board of directors (or persons performing the equivalent functions):

        a)      All  significant  deficiencies  and material  weaknesses  in the
                design or operation of internal control over financial reporting
                which are reasonably likely to adversely affect the registrant's
                ability to record, process, summarize and report financial data;
                and

        b)      Any fraud, whether or not material,  that involves management or
                other employees who have a significant  role in the registrant's
                internal control over financial reporting.

Dated:  March 29, 2007

/s/ Steven A. Rosso
President and Chief Executive Officer